The repository mixed both extensions, the molecule scenario used yml while the role itself used yaml. The yml extension is the one ansible-galaxy and molecule generate and the one the sibling roles use, so it is applied throughout. The first_found lookups in tasks/main.yml name the candidate files explicitly and were adjusted accordingly, otherwise the role would no longer find its distribution variables and its verification tasks. Co-authored-by: Copilot <copilot@github.com>